9916812553 has 2 divisors, whose sum is σ = 9916812554. Its totient is φ = 9916812552.

The previous prime is 9916812511. The next prime is 9916812559. The reversal of 9916812553 is 3552186199.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9880956409 + 35856144 = 99403^2 + 5988^2 .

It is an emirp because it is prime and its reverse (3552186199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9916812553 - 2⁹ = 9916812041 is a prime.

It is a super-2 number, since 2×9916812553² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9916812497 and 9916812506.

It is not a weakly prime, because it can be changed into another prime (9916812559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4958406276 + 4958406277.

It is an arithmetic number, because the mean of its divisors is an integer number (4958406277).

Almost surely, 2^9916812553 is an apocalyptic number.

It is an amenable number.

9916812553 is a deficient number, since it is larger than the sum of its proper divisors (1).

9916812553 is an equidigital number, since it uses as much as digits as its factorization.

9916812553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 49.

The square root of 9916812553 is about 99583.1941293309. The cubic root of 9916812553 is about 2148.4439834222.

The spelling of 9916812553 in words is "nine billion, nine hundred sixteen million, eight hundred twelve thousand, five hundred fifty-three".